How to modify json data format in php

Method: First use the "json_decode(string,true)" statement to convert JSON format into array format; then use the "array[element]="value"" statement to modify the data; finally use "json_encode( Array)" statement to convert the modified array into json format.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

// 追加写入用户名下文件 $code="001";//动态数据 $json_string = file_get_contents("text.json");// 从文件中读取数据到PHP变量 $data = json_decode($json_string,true);// 把JSON字符串转成PHP数组 $data[$code]=array("a"=>"as","b"=>"bs","c"=>"cs"); $json_strings = json_encode($data); file_put_contents("text.json",$json_strings);//写入 //修改 $json_string = file_get_contents("text.json");// 从文件中读取数据到PHP变量 $data = json_decode($json_string,true);// 把JSON字符串转成PHP数组 $data["001"]["a"]="aas"; $json_strings = json_encode($data); file_put_contents("text.json",$json_strings);//写入

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